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Resistor circuit

  • US 7,659,765 B2
  • Filed: 05/25/2006
  • Issued: 02/09/2010
  • Est. Priority Date: 06/07/2005
  • Status: Expired due to Fees
First Claim
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1. A resistor circuit comprising:

  • a reference MOS resistor;

    a variable MOS resistor;

    first control means for controlling a gate voltage of the reference MOS resistor such that a resistance of the reference MOS resistor is controlled to be constant;

    voltage detection means for detecting half of a drain-source voltage of the reference MOS resistor; and

    second control means for controlling the variable resistor by supplying a gate voltage of the variable MOS resistor on the basis of the gate voltage of the reference MOS resistor controlled by the first control means and half the drain-source voltage of the reference MOS resistor detected by the voltage detection means.

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